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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 96 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.65 × 4 =
  2. 2.34 × 4 =
  3. 3.38 × 8 =
  4. 4.15 × 8 =
  5. 5.25 × 8 =
  6. 6.16 × 8 =
  7. 7.14 × 8 =
  8. 8.19 × 8 =
  9. 9.40 × 4 =
  10. 10.26 × 8 =
  11. 11.13 × 8 =
  12. 12.59 × 4 =
  13. 13.68 × 4 =
  14. 14.43 × 4 =
  15. 15.24 × 4 =
  16. 16.21 × 8 =
  17. 17.67 × 4 =
  18. 18.66 × 4 =
  19. 19.35 × 8 =
  20. 20.29 × 8 =
  21. 21.62 × 4 =
  22. 22.39 × 4 =
  23. 23.17 × 8 =
  24. 24.14 × 4 =
  25. 25.46 × 4 =
  26. 26.29 × 4 =
  27. 27.32 × 8 =
  28. 28.20 × 8 =
  29. 29.37 × 8 =
  30. 30.41 × 4 =
  31. 31.21 × 4 =
  32. 32.33 × 8 =
  33. 33.40 × 8 =
  34. 34.36 × 8 =
  35. 35.25 × 4 =
  36. 36.19 × 4 =
  37. 37.32 × 4 =
  38. 38.44 × 4 =
  39. 39.22 × 8 =
  40. 40.48 × 4 =

Answer key

  1. 260
  2. 136
  3. 304
  4. 120
  5. 200
  6. 128
  7. 112
  8. 152
  9. 160
  10. 208
  11. 104
  12. 236
  13. 272
  14. 172
  15. 96
  16. 168
  17. 268
  18. 264
  19. 280
  20. 232
  21. 248
  22. 156
  23. 136
  24. 56
  25. 184
  26. 116
  27. 256
  28. 160
  29. 296
  30. 164
  31. 84
  32. 264
  33. 320
  34. 288
  35. 100
  36. 76
  37. 128
  38. 176
  39. 176
  40. 192

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